Tech support suggested I get a PD-5WS-DV on/off wireless switch for my application but I can't find it for sale (under $100). The Lutron.com site has no practical information on this model number. Similar Lutron switches on Amazon are the Lutron PD-5ANS-WH-A and PD-5ANS-WH-R but I don't know if it either of these are the same as the recommended PD-5WS-DV. The Lutron.com site has NO information on PD-5ANS-WH-A ("Your search for PD-5ANS-WH-A did not return any results") - same for PD-5ANS-WH-R. Q: Is either of the PD-5ANS switches workable substitutes for the PD-5WS-DV?